flight Aircraft
N23721
BOEING 737-700
Operated by UNITED AIRLINES INC
- Tail number
- N23721
- Type
- B737
- Mode-S
- A22539
Not currently tracked · last seen 1h ago
- Flights observed
- 205 showing last 50
- Avg flight time
- 2h 31m
- Typical route
- SEA → SFO
- Last seen
- 1h ago
Last known area
Recent flights last 50
| Date | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|
| 2026-05-29 | LAX → SFO | May 29, 23:05 UTC | May 30, 00:15 UTC | 1h 10m |
| 2026-05-29 | SNA → IAH | May 29, 20:40 UTC | May 29, 21:30 UTC | 50m |
| 2026-05-29 | CVG → ORD | May 29, 18:10 UTC | May 29, 18:50 UTC | 40m |
| 2026-05-29 | CUN → SFO | May 29, 13:40 UTC | May 29, 15:35 UTC | 1h 55m |
| 2026-05-29 | EWR → JAX | May 29, 10:15 UTC | May 29, 12:10 UTC | 1h 55m |
| 2026-05-29 | LGA → ORD | May 29, 00:05 UTC | May 29, 01:10 UTC | 1h 5m |
| 2026-05-28 | LGA → ORD | May 28, 23:27 UTC | May 29, 01:14 UTC | 1h 47m |
| 2026-05-28 | DEN → MCI | May 28, 21:25 UTC | May 28, 22:35 UTC | 1h 10m |
| 2026-05-28 | ORD → EWR | May 28, 14:10 UTC | May 28, 19:00 UTC | 4h 50m |
| 2026-05-28 | ORD → EWR | May 28, 14:08 UTC | May 28, 18:57 UTC | 4h 49m |
| 2026-05-28 | ATL → EWR | May 28, 01:47 UTC | May 28, 05:39 UTC | 3h 52m |
| 2026-05-28 | ATL → EWR | May 28, 01:50 UTC | May 28, 05:40 UTC | 3h 50m |
| 2026-05-27 | BUF → ORD | May 27, 21:50 UTC | May 27, 23:45 UTC | 1h 55m |
| 2026-05-27 | ORD → DEN | May 27, 19:20 UTC | May 27, 20:30 UTC | 1h 10m |
| 2026-05-27 | ORD → DEN | May 27, 19:08 UTC | May 27, 20:27 UTC | 1h 19m |
| 2026-05-26 | IAH → SFO | May 26, 21:04 UTC | May 26, 23:39 UTC | 2h 35m |
| 2026-05-26 | MCO → EWR | May 26, 14:30 UTC | May 26, 17:05 UTC | 2h 35m |
| 2026-05-26 | EWR → TPA | May 26, 09:59 UTC | May 26, 12:20 UTC | 2h 20m |
| 2026-05-26 | BDL → ORD | May 26, 00:29 UTC | May 26, 03:05 UTC | 2h 35m |
| 2026-05-25 | SNA → IAH | May 25, 21:15 UTC | May 25, 22:00 UTC | 45m |
| 2026-05-25 | CVG → ORD | May 25, 18:40 UTC | May 25, 19:25 UTC | 44m |
| 2026-05-25 | CUN → SFO | May 25, 13:45 UTC | May 25, 15:30 UTC | 1h 45m |
| 2026-05-25 | EWR → JAX | May 25, 10:10 UTC | May 25, 12:05 UTC | 1h 55m |
| 2026-05-24 | IAH → SFO | May 24, 18:45 UTC | May 24, 21:25 UTC | 2h 40m |
| 2026-05-24 | MCO → EWR | May 24, 14:40 UTC | May 24, 17:15 UTC | 2h 35m |
| 2026-05-23 | ORD → UVF | May 23, 14:40 UTC | May 24, 01:15 UTC | 10h 36m |
| 2026-05-23 | PHL → ORD | May 23, 10:50 UTC | May 23, 12:35 UTC | 1h 45m |
| 2026-05-22 | OGG → SFO | May 22, 23:55 UTC | May 23, 01:15 UTC | 1h 20m |
| 2026-05-22 | SEA → SFO | May 22, 19:00 UTC | May 22, 21:10 UTC | 2h 10m |
| 2026-05-22 | ORD → DCA | May 22, 15:22 UTC | May 22, 17:40 UTC | 2h 18m |
| 2026-05-22 | ORD → DCA | May 22, 15:05 UTC | May 22, 17:20 UTC | 2h 15m |
| 2026-05-22 | EWR → SFO | May 22, 02:00 UTC | May 22, 03:45 UTC | 1h 45m |
| 2026-05-21 | ORD → PHL | May 21, 23:00 UTC | May 22, 00:35 UTC | 1h 35m |
| 2026-05-21 | SEA → EWR | May 21, 15:00 UTC | May 21, 21:20 UTC | 6h 20m |
| 2026-05-21 | CHS → EWR | May 21, 11:00 UTC | May 21, 12:20 UTC | 1h 20m |
| 2026-05-21 | RDU → EWR | May 21, 01:15 UTC | May 21, 03:30 UTC | 2h 15m |
| 2026-05-20 | IAH → LGA | May 20, 18:45 UTC | May 20, 23:00 UTC | 4h 15m |
| 2026-05-20 | MEX → IAH | May 20, 15:45 UTC | May 20, 17:25 UTC | 1h 40m |
| 2026-05-20 | IAH → MEX | May 20, 12:30 UTC | May 20, 14:35 UTC | 2h 5m |
| 2026-05-20 | IAH → MEX | May 20, 12:37 UTC | May 20, 14:31 UTC | 1h 54m |
| 2026-05-20 | IAH → SFO | May 20, 02:40 UTC | May 20, 03:50 UTC | 1h 10m |
| 2026-05-20 | EWR → MIA | May 20, 00:05 UTC | May 20, 01:25 UTC | 1h 20m |
| 2026-05-19 | EWR → MIA | May 19, 23:49 UTC | May 20, 01:23 UTC | 1h 34m |
| 2026-05-19 | SEA → SFO | May 19, 14:20 UTC | May 19, 18:15 UTC | 3h 55m |
| 2026-05-19 | SEA → SFO | May 19, 14:25 UTC | May 19, 18:47 UTC | 4h 22m |
| 2026-05-18 | BNA → EWR | May 18, 22:00 UTC | May 19, 01:55 UTC | 3h 55m |
| 2026-05-18 | SFO → DFW | May 18, 15:15 UTC | May 18, 20:10 UTC | 4h 54m |
| 2026-05-18 | EWR → PBI | May 18, 10:25 UTC | May 18, 13:05 UTC | 2h 40m |
| 2026-05-18 | SEA → SFO | May 18, 01:20 UTC | May 18, 03:50 UTC | 2h 30m |
| 2026-05-17 | FLL → EWR | May 17, 20:15 UTC | May 17, 23:50 UTC | 3h 35m |
Specifications
| Registration | N23721 |
| Aircraft type | BOEING 737-700 (B737) |
| Operator | UNITED AIRLINES INC |
| Mode-S code | A22539 · 50422471 (octal) |
Looking for transponder-level data? View the Mode-S A22539 page for country allocation, callsign history, and ADS-B signal details.
N23721 frequently asked
What type of aircraft is N23721?
N23721 is a BOEING 737-700 (ICAO type code B737).
Who operates N23721?
N23721 is operated by UNITED AIRLINES INC.
What is the Mode-S transponder code for N23721?
N23721 broadcasts on Mode-S (ICAO 24-bit) address A22539 (octal 50422471). View the transponder page.
What route does N23721 typically fly?
N23721 most frequently flies between SEA and SFO based on observed flights.
Where is N23721 right now?
N23721 is not currently being tracked; last seen 1h ago.